price/cost calculator for wordpress

Hi! I’m opening a wordpress store for buy phones and I need someone to build me a price/cost calculator for the phones I want to buy. Example: step 1: Apple, Samsung Step 2: Which phone? Step 3: how many gigs step 4: condition and so on.. here are some examples of websites using this method
https://www.getorchard.com/sell-online/
https://www.cellsensei.com/brand/apple